Answer
$-\frac{9}{20}$
Work Step by Step
In order to add or subtract fractions, we start by making a common denominator (bottom of the fraction). Thus, we multiply 3/4 by 5/5 and 3/10 by 2/2 to obtain: $\frac{6}{20}-$($\frac{15}{20}$)=-$\frac{9}{20}$.
